Powertrain, generic · Hybrid propulsion

P0BCD Generator Inverter Temperature Sensor A Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0BCD flags a generator inverter temperature sensor A whose signal is electrically valid but does not fit the operating state, for example a value stuck at one temperature or far from the other temperatures after a long soak. Ford documents this exact code: on 2020 Lincoln Aviator 3.0L hybrids built up to 18 July 2020, P0BCD stored in the inverter system controller (SOBDMC) lights the MIL and is caused by software; the fix is reprogramming that module. Patents by Hino and Mitsubishi Electric describe how such checks work, comparing heat generated in the inverter with the measured temperature change or detecting a stuck sensor. Circuit faults go to P0BCE or P0BCF instead.

Likely causes

Inverter controller software (Ford SSM 49120, Lincoln Aviator 2020)
Sensor drifting or stuck at one value
Uneven inverter coolant flow distorting the comparison

Symptoms

  • Malfunction indicator lamp
  • Often no noticeable change in driving
  • Hybrid system warning message possible

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–4,000
Time0.5–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

generator inverter temp sensor awiring harnesshybrid control module

Related codes

P0BCCP0BCEP0BCFP0BD0P0DF4P0A3E

References: static.nhtsa.gov, law.cornell.edu, patents.google.com, patents.google.com.